When people use hand same hand gestures in photographs or digital photographs; like throwing up a peace sign, sign of the horn, jazz fingers, the middle finger, or the hang loose sign. It can also happen when people strikes a familiar pose every time some one takes a picture. This can be something as subtle as sticking out your chest, turning to one side, tilting the head, poking out your butt or something as extreme as "Blue Steel", "Le Tigre" or "Ferrari" - made popular in the movie ZooLander.

Wow I think that dude has phototurrets, every time some one takes his picture he throws up the peace sign!